New research suggests a possible explanation for the organization of operons, jointly controlled clusters of genes that evolved in bacterial chromosomes. Operons, which are found in the chromosomes of ...

Last week I finally addressed promoters and gave a bit of background on the lac operon. Looking back, I feel that I didn't give the topic of operons adequate treatment. They are a very crucial aspect ...

The 92-year-old bacterial geneticist who helped pioneer the study of gene regulation has passed away. A series of rodent experiments showed that even with abundant food and water, personal space is ...

This is a preview. Log in through your library . Abstract We have cloned a DNA fragment harboring the genes for ribosomal proteins L2, L4, and L23 on a plasmid vector that contains a lac operator and ...

You have full access to this article via your institution. Figure 1: Variation of the steady-state β-galactosidase activity with the specific growth rate. Because the β-galactosidase activity of ...

Mutants of E. coli K12 with deletions of the β -galactosidase gene (lacZ) can reacquire the ability to hydrolyze β -galactosides during prolonged intense selection for growth on lactose. Full lactose ...